ryan-johnson-databricks commented on code in PR #40677:
URL: https://github.com/apache/spark/pull/40677#discussion_r1161715137
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sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileIndex.scala:
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@@ -23,11 +23,30 @@ import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.catalyst.expressions._
import org.apache.spark.sql.types.StructType
+/**
+ * A file status augmented with optional metadata. File formats can use the
extra metadata to expose
+ * custom file-constant metadata columns, but in general tasks and readers can
use the per-file
+ * metadata however they see fit.
+ */
+case class FileStatusWithMetadata(fileStatus: FileStatus, metadata:
Map[String, Any] = Map.empty) {
Review Comment:
I do like the idea of supporting `Literal` as one of the supported cases --
it simplifies the type checking a bit, in that the "supported" primitive types
are merely those for which the implementation will automatically create the
`Literal` wrapper as a courtesy (similar to string vs. UTF8String).
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